7. A+B contracts have several limitations and shortfalls. Which of the following are limitations associated with using A+B contracts on projects? (Select all that apply). Construction efficiency is not optimized. The contracts can be complex and are not very common. The total project duration (design plus construction) is increased. The final project cost of construction is not known until the end of the project. A+B contracts are not effective in areas where the cost per day to the Owner for not having the project completed is minimal. None of the above